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Surname Iorio (Iorio , 约里奥 , يوريو) , around the globe, is a common last name. The surname Iorio is characteristic of Italy, where it is quite a common surname, Paraguay, where it is quite a rare surname, and Luxembourg. Measured by absolute frequency, the name is most common in Italy, the United States, and Brazil. Very seldom, Iorio is the forename as well as the last name.